Reusable water bottles are trendy right now! You’ll look stylish and keep your drink cool at the same time with these custom insulated water bottles. Basically a Mini Fridge Maybe these stainless steel water bottles won’t hold your leftovers, but they will keep your water insanely cold! Each bottle is fitted with copper vacuum insulation that lasts for up to 48 hours. You get two full days of a nice, cold drink! *These insulated water bottles are also safe for hot drinks, keeping them at temperature for up to 12 hours.